Epicardial and intramural excitation of normal heart in six patients 50 years of age and older.
D000368:Aged; D004594:Electrophysiology; D006321:Heart / Q000502:physiology*; D006801:Humans; D008875:Middle Aged; D011013:Pneumonectomy; D013997:Time Factors; D016276:Ventricular Function